小波包分解提取高采样率GPS地震波信号
|
摘要
随着高采样率GPS接收机的出现、高精度的定轨以及数据处理技术的发展,利用GPS观测高频率、瞬态的地震波信号成为可能.但如何消除混叠在地震波信号中的多路径、随机噪声等误差,有效地提取地震波信号,仍然是制约高采样率GPS及其地球物理应用的重要因素.提出一种基于小波包分解的方法,对动态位移序列中的多路径误差进行消除,同时去除高频率随机噪声,提取地震波信号.通过结合SCIGN的19个GPS测站的1Hz采样GPS观测数据,对2010年墨西哥M7.2地震的地震波引起的地表动态位移进行解算,采用小波包分解有效地提取地震波信号并对其进行谱分析.结果表明,该方法提取的地震波信号能较好地反映出地震波的传播及其特性,具有无需多天重复观测、处理精度高等特点.
With the development of high-rate GPS receivers,precise orbit and processing technology of GPS data,it is possible to observe the high frequency,transient dynamic displacement by GPS.However,it remains a problem as how to mitigate the error such as multipath errors,and random noise aliasing in geophysical signals so as to extract seismic signals,which in turn limits the high-rate GPS and its geophysical applications.In this paper,an approach based on wavelet packets decomposition(WPD) is presented to extract seismic signals through mitigating the multipath error and random noise of dynamic displacement series from high-rate GPS.With the 1 Hz observation data from 19 stations in Southern California Integrated GPS Network(SCIGN) during the Mexico M7.2 earthquake in 2010,the ground displacement is calculated.Meanwhile,the approach based on WPD is introduced for seismic signal extraction and spectrum analysis.As is shown in results,the approach is accurate and effective in seismic signal extraction to reflect the characteristics of seismic wave propagations and it enjoys an advantage that it does not necessarily involve multiple-day observation.
With the development of high-rate GPS receivers,precise orbit and processing technology of GPS data,it is possible to observe the high frequency,transient dynamic displacement by GPS.However,it remains a problem as how to mitigate the error such as multipath errors,and random noise aliasing in geophysical signals so as to extract seismic signals,which in turn limits the high-rate GPS and its geophysical applications.In this paper,an approach based on wavelet packets decomposition(WPD) is presented to extract seismic signals through mitigating the multipath error and random noise of dynamic displacement series from high-rate GPS.With the 1 Hz observation data from 19 stations in Southern California Integrated GPS Network(SCIGN) during the Mexico M7.2 earthquake in 2010,the ground displacement is calculated.Meanwhile,the approach based on WPD is introduced for seismic signal extraction and spectrum analysis.As is shown in results,the approach is accurate and effective in seismic signal extraction to reflect the characteristics of seismic wave propagations and it enjoys an advantage that it does not necessarily involve multiple-day observation.
引文
Bilich,A.,Cassidy,J.F.,Larson,K.M.,et al.,2008.GPSseismology:application to the2002Mw=7.9Denalifault earthquake.Bulletin of Seismological Society ofAmerica,98(2):593-606.doi:10.1785/0120070096
Bock,Y.,Prawirodirdjo,L.,Melboume,T.I.,2004.Detection of arbitrarily large dynamic ground motions with adense high-rate GPS network.Geophysical ResearchLetters,31(6):L06604.doi:10.1029/2003GL019150
Chang,C.,Juang,J.,2008.An adaptive multipath mitigationfilter for GNSS applications.Eurasip Journal on Advances in Signal Processing,214815.doi:10.1155/2008/214815
Choi,K.H.,Bilich,A.,Larson,K.M.,et al.,2004.Modifiedsidereal filtering:implications for high-rate GPS positioning.Geophysical Research Letters,31(22):L22608.doi:10.1029/2004GL021621
Dai,W.J.,Ding,X.L.,Zhu,J.J.,et al.,2006.EMD filtermethod and its application in GPS multipath.Acta Geodatica et Cartographica Sinica,35(4):321-327(inChinese with English abstract).
Fang,R.X.,Shi,C.,Gu,S.F.,2009.Precise point positioning with high-rate GPS data applied to seismic displacements analysis.Geomatics and Information Science of Wuhan University,34(11):1340-1358(in Chinese with English abstract).
Fang,Y.,Jiang,Z.S.,Zhang,J.,et al.,2009.High-resolution characteristics of recent crustal movement in Qinghai-Tibet plateau.Earth Science—Journal of ChinaUniversity of Geosciences,34(3):399-404(in Chinesewith English abstract).
Gomberg,J.,Bodin,P.,Larson,K.,et al.,2004.Earthquakenucleation by transient deformations caused by the M=7.9Denali,Alaska,earthquake.Nature,427(6975):621-624.doi:10.1038/nature02335
Genrich,J.F.,Bock,Y.,1992.Rapid resolution of crustalmotion at short ranges with the global positioning system.Journal of Geophysical Research,97(B3):32613269.doi:10.1029/91JB02997
Hardebeck,J.L.,Boatwright,J.,Dreger,D.,et al.,2005.Preliminary report on the22December2003,M6.5SanSimeon,California earthquake.Seismological ResearchLetters,75(2):155-172.
Huang,D.F.,Ding,X.L.,Chen,Y.Q.,et al.,2001.Waveletfilters based separation of GPS multi-path effects andengineering structure vibrations.Acta Geodatica et Cartographica Sinica,30(1):36-41(in Chinese with English abstract).
Ji,C.,Larson,K.M.,Tan,Y.,et al.,2004.Slip history ofthe2003San Simeon earthquake constrained by combining1Hz GPS,strong motion,and teleseismic data.Geophysical Research Letters,31(17):L17608.doi:10.1029/2004GL020448
Kouba,J.,2003.Measuring seismic waves induced by largeearthquakes with GPS.Studia Geophysical Geodaetica,47(4):741-755.doi:10.1023/A:1026390618355
Larson,K.M.,Bodin,P.,Gomberg,J.,et al.,2003.Using1Hz GPS to measure deformations caused by the Denalifault earthquake.Science,300(5624):1421-1424.doi:10.1126/sciences.1084531
Larson,K.M.,2009.GPS seismology.Journal of Geodesy,83(3-4):227-233.doi:10.1007/s00190-008-0233-x
Miyazaki,S.,Larson,K.M.,Choi,K.H.,et al.,2004.Modeling the rupture process of the2003September25Tokachi-Oki(Hokkaido)earthquake using1Hz GPS data.Geophysical Research Letters,31(21):L21603.
Xia,L.Y.,Liu,J.N.,2001.Approach for multipath reduction using wavelet algorithm.ION GPS2001:2134-2143.
Zhong,P.,Ding,X.L.,Zheng,D.W.,et al.,2006.Separation of structure vibrations and GPS multipath signalsusing Vondrak filter.J.Cent.South.Univ.(Science andTechnology),36(6):1189-1195(in Chinese with English abstract).
戴吾蛟,丁晓利,朱建军,等,2006.基于经验模式分解的滤波去噪法及其在GPS多路径效应中的应用.测绘学报,35(4):321-327.
方荣新,施闯,辜声峰,等,2009.基于PPP动态定位技术的同震地表形变分析.武汉大学学报(信息科学版),34(11):1340-1358.
方颖,江在森,张晶,等,2009.青藏高原现今高分辨率地壳运动特征.地球科学——中国地质大学学报,34(3):399-404.
黄丁发,丁晓利,陈永奇,等,2001.GPS多路径效应影响与结构振动的小波滤波筛分方法.测绘学报,30(1):36-41.
钟萍,丁晓利,郑大伟,等,2006.Vondrak滤波法用于结构振动与GPS多路径信号的分离.中南大学学报(自然科学版),36(6):1189-1195.
Bock,Y.,Prawirodirdjo,L.,Melboume,T.I.,2004.Detection of arbitrarily large dynamic ground motions with adense high-rate GPS network.Geophysical ResearchLetters,31(6):L06604.doi:10.1029/2003GL019150
Chang,C.,Juang,J.,2008.An adaptive multipath mitigationfilter for GNSS applications.Eurasip Journal on Advances in Signal Processing,214815.doi:10.1155/2008/214815
Choi,K.H.,Bilich,A.,Larson,K.M.,et al.,2004.Modifiedsidereal filtering:implications for high-rate GPS positioning.Geophysical Research Letters,31(22):L22608.doi:10.1029/2004GL021621
Dai,W.J.,Ding,X.L.,Zhu,J.J.,et al.,2006.EMD filtermethod and its application in GPS multipath.Acta Geodatica et Cartographica Sinica,35(4):321-327(inChinese with English abstract).
Fang,R.X.,Shi,C.,Gu,S.F.,2009.Precise point positioning with high-rate GPS data applied to seismic displacements analysis.Geomatics and Information Science of Wuhan University,34(11):1340-1358(in Chinese with English abstract).
Fang,Y.,Jiang,Z.S.,Zhang,J.,et al.,2009.High-resolution characteristics of recent crustal movement in Qinghai-Tibet plateau.Earth Science—Journal of ChinaUniversity of Geosciences,34(3):399-404(in Chinesewith English abstract).
Gomberg,J.,Bodin,P.,Larson,K.,et al.,2004.Earthquakenucleation by transient deformations caused by the M=7.9Denali,Alaska,earthquake.Nature,427(6975):621-624.doi:10.1038/nature02335
Genrich,J.F.,Bock,Y.,1992.Rapid resolution of crustalmotion at short ranges with the global positioning system.Journal of Geophysical Research,97(B3):32613269.doi:10.1029/91JB02997
Hardebeck,J.L.,Boatwright,J.,Dreger,D.,et al.,2005.Preliminary report on the22December2003,M6.5SanSimeon,California earthquake.Seismological ResearchLetters,75(2):155-172.
Huang,D.F.,Ding,X.L.,Chen,Y.Q.,et al.,2001.Waveletfilters based separation of GPS multi-path effects andengineering structure vibrations.Acta Geodatica et Cartographica Sinica,30(1):36-41(in Chinese with English abstract).
Ji,C.,Larson,K.M.,Tan,Y.,et al.,2004.Slip history ofthe2003San Simeon earthquake constrained by combining1Hz GPS,strong motion,and teleseismic data.Geophysical Research Letters,31(17):L17608.doi:10.1029/2004GL020448
Kouba,J.,2003.Measuring seismic waves induced by largeearthquakes with GPS.Studia Geophysical Geodaetica,47(4):741-755.doi:10.1023/A:1026390618355
Larson,K.M.,Bodin,P.,Gomberg,J.,et al.,2003.Using1Hz GPS to measure deformations caused by the Denalifault earthquake.Science,300(5624):1421-1424.doi:10.1126/sciences.1084531
Larson,K.M.,2009.GPS seismology.Journal of Geodesy,83(3-4):227-233.doi:10.1007/s00190-008-0233-x
Miyazaki,S.,Larson,K.M.,Choi,K.H.,et al.,2004.Modeling the rupture process of the2003September25Tokachi-Oki(Hokkaido)earthquake using1Hz GPS data.Geophysical Research Letters,31(21):L21603.
Xia,L.Y.,Liu,J.N.,2001.Approach for multipath reduction using wavelet algorithm.ION GPS2001:2134-2143.
Zhong,P.,Ding,X.L.,Zheng,D.W.,et al.,2006.Separation of structure vibrations and GPS multipath signalsusing Vondrak filter.J.Cent.South.Univ.(Science andTechnology),36(6):1189-1195(in Chinese with English abstract).
戴吾蛟,丁晓利,朱建军,等,2006.基于经验模式分解的滤波去噪法及其在GPS多路径效应中的应用.测绘学报,35(4):321-327.
方荣新,施闯,辜声峰,等,2009.基于PPP动态定位技术的同震地表形变分析.武汉大学学报(信息科学版),34(11):1340-1358.
方颖,江在森,张晶,等,2009.青藏高原现今高分辨率地壳运动特征.地球科学——中国地质大学学报,34(3):399-404.
黄丁发,丁晓利,陈永奇,等,2001.GPS多路径效应影响与结构振动的小波滤波筛分方法.测绘学报,30(1):36-41.
钟萍,丁晓利,郑大伟,等,2006.Vondrak滤波法用于结构振动与GPS多路径信号的分离.中南大学学报(自然科学版),36(6):1189-1195.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心